Does mean temperature tendency due to parametrisations (paramId 235005) mean the total diabatic heating?

[JC_Lee]

Hi guys!

My specific question is the same as the title of this post: does the ERA5-provided parameter, "mean temperature tendency due to parametrisations (paramId 235005) mean the total diabatic heating", which ought to be comprised of long (paramId 235001)+short (paramId 235002) wave radiational heating, latent heating, and the vertical mixing? 

Another question is about the date and time specification. As shown in the following picture, when downloading this parameter, I've chosen the time of 06 and 18, and the step of 0. Given that this data type is forecast (termed as 'fc' in the MARS request), I am quite uncertain whether the data (step=0) I downloaded represent the analysis data per se, whereby the daily mean can be calculated by averaging the value at 06 and 08?

Thanks,

JC Lee

[xiran_xu]

Hello,
Have you solved this problem? Does the “mean temperature tendency due to parametrisations” mean the total diabatic heating?

Thank you very much
xiran xu

[prasanth_s]

@xiran_xu

“mean temperature tendency due to parametrisations

Hello Xiran Xu,

If you haven’t found the answer yet, here it is below.

Yes. The “Mean temperature tendency due to parametrisation” is the diabatic heating rate. Please check out the following reference.

Ploeger et al., 2021 URL: https://doi.org/10.5194/acp-2020-1253

Since the diabatic heating rate of the air parcel determines whether the air parcel ascents or descents, it is often treated as the vertical velocity of the air parcel in climate models. Please have a look at this paper too.

Chang et al., 2020 URL:10.1029/2022JD037020

Regards,
Prasanth